Description

2-Oxepanone, Polymer With 1,4-Butanediol And 1,1-Methylenebisisocyanatobenzene CAS NO 68259-27-8 is a specialized polyurethane prepolymer derived from ε-caprolactone, 1,4-butanediol, and methylene diphenyl diisocyanate (MDI). This engineered polymer is valued for its excellent hydrolytic stability, mechanical toughness, and biocompatibility, making it a critical raw material for high-performance applications. It is primarily sought by manufacturers in the medical device, specialty adhesive, and advanced elastomer industries who require materials with consistent quality and reliable performance.

Application

• Medical Device Coatings: Used as a key component in biocompatible coatings for catheters, guidewires, and implantable devices due to its stability and flexibility.
• High-Performance Adhesives & Sealants: Serves as a prepolymer in formulations requiring strong bonding, chemical resistance, and durability in demanding environments.
• Specialty Elastomers and Thermoplastic Polyurethanes (TPU): Imparts enhanced mechanical properties, such as tear strength and abrasion resistance, in industrial and consumer goods.
• Controlled-Release Matrices: Utilized in pharmaceutical and agrochemical applications for creating matrices that provide sustained release of active ingredients.
• Biodegradable Polymer Blends: Incorporated into polymer blends aimed at achieving specific degradation profiles for environmentally sensitive applications.
• Industrial Protective Coatings: Forms the basis for coatings that protect metal, concrete, and other substrates from corrosion, moisture, and wear.

Basic Information

Product Name	2-Oxepanone, Polymer With 1,4-Butanediol And 1,1-Methylenebisisocyanatobenzene
CAS No.	68259-27-8
Molecular Formula	(C6H10O2 · C4H10O2 · C15H10N2O2)n
Molecular Weight	Polymer - Contact for details
Synonyms	Poly(ε-caprolactone-co-1,4-butanediol-co-MDI); MDI-Terminated Polycaprolactone Polyol; PCL-MDI Prepolymer; Polycaprolactone Polyurethane Prepolymer; ε-Caprolactone/Butanediol/MDI Copolymer; Thermoplastic Polyurethane based on PCL; Aliphatic-Aromatic Polyurethane Elastomer based on Caprolactone
EINECS	Contact for details

Quality Control

Our production of this polyurethane prepolymer adheres to strict quality management systems to ensure batch-to-batch consistency and performance reliability. Key parameters such as NCO content, hydroxyl value, viscosity, and molecular weight distribution are rigorously monitored. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and physical specifications is provided with each shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at temperatures between 15-25°C (59-77°F). This material is moisture-sensitive (hygroscopic) and should be kept under a dry, inert atmosphere (e.g., nitrogen) to prevent premature reaction and degradation. Keep away from strong acids, bases, and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white pellets or solid
Identification (IR)	Conforms to reference spectrum
NCO Content	3.0 - 6.0 %
Hydroxyl Value	< 5 mg KOH/g
Viscosity (at 75°C)	2000 - 8000 mPa·s
Melting Point / Softening Point	40 - 60 °C
Moisture Content (Karl Fischer)	< 0.05 %
Residual Monomer (HPLC)	< 0.5 %

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.